Q:
What does the up-shift light mean?

The up-shift light is on your instrument cluster if your vehicle is equipped with a manual transmission. The up-shift light will illuminate when a shift to a higher gear would increase the fuel economy of your vehicle. When you shift to a higher gear, or when an up-shift will no longer increase efficiency, then the up-shift light will turn off.

Q: What viscosity oil should I use in my car?

Q: Shifting won't go into gear - 1973 Chevrolet C20

Check fluid level in the transmission. Did you correctly engage the front pump with the torque convertor, and filled the torque convertor with fluid before installing it? Let the truck idle 15 minutes or so, and check for Drive/Reverse after...

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